January 2020
Intermediate to advanced
548 pages
13h 36m
English
Content preview from Clean Code in JavaScript
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Contract
A good name indicates a contract with other parts of the surrounding abstraction. A variable, by its name, may indicate how it will be used or what type of value it contains and what general expectations we should have about its behavior. It's not usually thought about, but when we name something, we are, in fact, setting up a series of implicit expectations or contracts that will define how people understand and use that thing. Here are some examples of the hidden contracts that exist in JavaScript:
- A variable prefixed with is, for example, isUser, is expected to be a Boolean type (either true or false).
- A variable in all-caps is expected to be a constant (only set once and immutable), for example, DEFAULT_USER_EXPIRY.
- Variables ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.